averageguy589 :
its a i5 3470 and 280x, should only use 450w so im sure these can both run it. im just wondering which one wont blow up
Neither of them
should blow up, but I'd personally recommend getting the Antec 750W, it's a better trusted architecture, better efficiency, and this one has even more wattage breathing room. It's technically made by Seasonic, and they're a trusted brand.
Yes, Seasonic manufactures the Antec PSUs, they just have the Antec brand.